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COMMITMENTS AND CONTINGENCIES (Detail Textuals) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Long-term Purchase Commitment [Line Items]    
Maximum repurchase collateral amount $ 49,393 $ 45,196
Capital Addition Purchase Commitments    
Long-term Purchase Commitment [Line Items]    
Commitment for construction and acquisition of property, plant and equipment 14,097  
Pennsylvania    
Long-term Purchase Commitment [Line Items]    
Estimated cost of operations 24,700  
Capital cost incurred 23,400  
Tennessee    
Long-term Purchase Commitment [Line Items]    
Estimated cost of operations 21,100  
Capital cost incurred 12,500  
Current estimated costs of administrative building $ 4,200